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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _CLONE3_SELFTESTS_H
#define _CLONE3_SELFTESTS_H
#define _GNU_SOURCE
#include <sched.h>
#include <stdint.h>
#include <syscall.h>
#include <linux/types.h>
#define ptr_to_u64(ptr) ((__u64)((uintptr_t)(ptr)))
#ifndef __NR_clone3
#define __NR_clone3 -1
struct clone_args {
__aligned_u64 flags;
__aligned_u64 pidfd;
__aligned_u64 child_tid;
__aligned_u64 parent_tid;
__aligned_u64 exit_signal;
__aligned_u64 stack;
__aligned_u64 stack_size;
__aligned_u64 tls;
__aligned_u64 set_tid;
__aligned_u64 set_tid_size;
};
#endif
static pid_t sys_clone3(struct clone_args *args, size_t size)
{
fflush(stdout);
fflush(stderr);
return syscall(__NR_clone3, args, size);
}
static inline void test_clone3_supported(void)
{
pid_t pid;
struct clone_args args = {};
if (__NR_clone3 < 0)
ksft_exit_skip("clone3() syscall is not supported\n");
/* Set to something that will always cause EINVAL. */
args.exit_signal = -1;
pid = sys_clone3(&args, sizeof(args));
if (!pid)
exit(EXIT_SUCCESS);
if (pid > 0) {
wait(NULL);
ksft_exit_fail_msg(
"Managed to create child process with invalid exit_signal\n");
}
if (errno == ENOSYS)
ksft_exit_skip("clone3() syscall is not supported\n");
ksft_print_msg("clone3() syscall supported\n");
}
#endif /* _CLONE3_SELFTESTS_H */
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